Over the recent decades, liquid scintillator (LS) has been used as the target in several neutrino experiments, such as KamLAND[1]}, Borexino[2]}, Daya Bay[3]}, Double Chooz[4]}, and Jiangmen Underground Neutrino Observatory (JUNO)[5]}. Motivated by the physics goals, the requirements on LS are also increased, such as longer attenuation length (A.L.), higher light yield, and ultra-low radioactive background. In the last decade, numerous experiments have been conducted to characterize the performance of LS-based detectors[6]}, [7]}, [8]}, [9]}, [10]}.
